By Jochen Voss, last updated 2013-07-16
The sha256d package provides an implementation of the SHA-256d hash algorithm (also known as "double SHA-256") for the Go programming language. SHA-256d is a cryptographic hash, first proposed by Ferguson and Schneier in the book "Practical Cryptography". The SHA-256d hash is used in the Bitcoin protocol and in the Fortuna random number generator.
The SHA-256d hash is obtained by applying the SHA-256 hash twice, i.e.by first applying SHA-256 to the data and then again to the resulting hash.
To download the sha256d package, simply use the
go get command as follows:
go get github.com/seehuhn/sha256d
The source code is available at github.com/seehuhn/sha256d.
The sha256d package implements the standard hash.Hash interface. Example:
hash := sha256d.New()
n, _ := hash.Write([]byte("hello"))
hashVal := hash.Sum(nil)
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